Java wrapper for DistilledPagePrefs.

chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerServiceFactory.java

Index: chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerServiceFactory.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerServiceFactory.java b/chrome/android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerServiceFactory.java
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.dom_distiller;
+
+import org.chromium.base.JNINamespace;
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.components.dom_distiller.core.DomDistillerService;
+
+import java.util.HashMap;
+
+/**
+ * DomDistillerServiceFactory maps Profiles to instances of
+ * {@link DomDistillerService} instances. Each {@link Profile} will at most
+ * have one instance of this service. If the service does not already exist,
+ * it will be created on the first access.
+ */
+@JNINamespace("dom_distiller::android")
+public class DomDistillerServiceFactory {
+
+    private static final HashMap<Profile, DomDistillerService> sServiceMap =
+        new HashMap<Profile, DomDistillerService>();
+
+    /**
+     * Returns Java DomDistillerService for given Profile.
+     */
+    public static DomDistillerService getForProfile(Profile profile) {
+        ThreadUtils.assertOnUiThread();
+        DomDistillerService service = sServiceMap.get(profile);
+        if (service == null) {
+            service = (DomDistillerService) nativeGetForProfile(profile);
+            sServiceMap.put(profile, service);
+        }
+        return service;
+    }
+
+    private static native DomDistillerService nativeGetForProfile(Profile profile);
+}